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This paper present ultra compact diplexers and triplexers based on ultra compact E-plane waveguide filters. The ultra compact filters have significantly better attenuation and selectivity at both upper and lower stop bands compared to that of conventional E-plane filters. This allows channels to be placed much closer to one another. The filters retain ease of manufacturing of typical E-plane filters...
This paper presents an ultra compact waveguide bandpass filter that exhibits a pseudo-elliptic response. The transmission zero created in the upper stopband to form a rapid roll off is produced through a bypass coupling with higher order modes. A 3rd order filter is designed at the centre frequency of 9.4 GHz with a 5.3% fractional bandwidth. The proposed structure's size is 38% smaller than one of...
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